CN104717443B - Automatic switching method from many video formats to SMPTE274 agreement 1080i resolution videos - Google Patents
Automatic switching method from many video formats to SMPTE274 agreement 1080i resolution videos Download PDFInfo
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Abstract
The present invention relates to many video formats to the automatic switching method of SMPTE274 agreement 1080i resolution videos, comprise the following steps：1】Create automated conversion system；2】The vision signal of input is respectively fed in protocol detection module；3】High level enables the valid pixel that signal CEn drives agreement N collecting units corresponding with agreement N detection units to gather incoming video signal；4】High level enables signal CEn as the control signal amount of multidiameter option switch controller；5】Scaling processing module is scaled 1920*1080 resolution sizes, while being written into output memory cell；6】The control pixel stream that control module produces video blanking area according to SMPTE274 standard 1080i resolution videos agreement is sent, so as to realize the conversion of SMPTE274 standard 1080i resolution video agreements.The present invention solves the video of any protocol type to SMPTE274 integrated sex chromosome mosaicism, and the video of any protocol type and resolution ratio can be automatically converted to SMPTE274 standard 1080i resolution video protocol videos by the present invention, and video format conversion is time-consuming small.
Description
Technical field
The invention belongs to Video processing, graph image field, and in particular to a kind of many video formats are to SMPTE274 agreements
The automatic switching method of 1080i resolution videos.
Background technology
HDMI (HDMI, High Defination Multimedia Interface) is a kind of number
Word video/audio interfacing, the ability of its powerful support 1080i resolution images transmission, makes it often as photoelectricity
The general output interface of integral system HD video.But for existing vision sensor, its video protocols exported and
Resolution ratio is different, therefore the video of various agreements for sometimes generally requiring to export vision sensor enters row format and changes and contract
Put the resolution ratio for 1080i；Although having occurred in that various video formats to meeting SMPTE274 agreement 1080i resolution ratio at present
The chip of Video Quality Metric, but this kind of chip is often only supported to a kind of or a class input video encoding and decoding.
With electronic technology, the development of large scale integrated circuit, realized using field programmable gate array (FPGA)
Complicated control and processing function has very big advantage in terms of integration, stability and reliability, and research is based on
What the automatic conversion control method of FPGA various video form to the 1080i resolution videos for meeting SMPTE274 standards had
Wide application prospect.
The content of the invention
The present invention is to be changed to solve the video of any protocol type to SMPTE274 agreement 1080i resolution videos
Integrated sex chromosome mosaicism, it is proposed that automatic switching method from a kind of many video formats to SMPTE274 agreement 1080i resolution videos.
The technical solution of the present invention：
Many video formats are to the automatic switching method of SMPTE274 agreement 1080i resolution videos, and it is characterized in that,
Comprise the following steps：
1】Create automated conversion system：
Including protocol detection module：Height is produced for carrying out agreement matching to incoming video signal, and according to matching result
Level enables signal CEn or low level enables signal, including the detection unit of agreement 1, the detection unit ... of agreement 2 and agreement N
Detection unit；
Video acquisition module：The valid pixel of incoming video signal to matching by protocol detection module is adopted
Collection, including the collecting unit of agreement 1, the collecting unit ... of agreement 2 and agreement N collecting units；The collecting unit of various agreements with
Detection unit is corresponded, and the high level enables signal CEn and inputted to corresponding agreement N collecting units and multidiameter option switch
Controller；
Multidiameter option switch controller：For under the control that high level enables signal CEn, the video that agreement is matched to be adopted
The effective pixel data that collection module is collected buffers into collection memory cell；
Gather memory cell：Effective pixel data for caching incoming video signal；
Scale processing module：Effective pixel data is read from collection memory cell and use bilinearity for real time sequence
Interpolation algorithm scales it the resolution sizes for 1920*1080, while sending it to output memory cell；
Export memory cell：For storing the effective pixel data after scaling processing module processing；
And send control module：For producing video blanking according to SMPTE274 standard 1080i resolution videos agreement
The control pixel stream in area, and the pixel data after scaling is sequentially read from output memory cell, it is filled into video data stream
Effective pixel region, so as to realize the conversion of SMPTE274 standard 1080i resolution video agreements；
2】The vision signal of input is respectively fed into protocol detection module to be detected in each protocol detection unit,
If the vision signal of input is matched with the agreement of agreement N detection units, agreement N detection units produce the enable of high level
Signal CEn, while remaining protocol detection unit, which produces low level, enables signal；
3】High level enables signal CEn and drives agreement N collecting units collection input video corresponding with agreement N detection units
The valid pixel of signal；Low level enables signal and makes to be in reset state with the agreement collecting unit corresponding to it simultaneously；
4】High level enables signal CE as the control signal amount of multidiameter option switch controller so that only agreement matching
The valid pixel of vision signal of agreement N collecting units collection to pass through multidiameter option switch controller cache single to storage is gathered
Member；
5】Scale processing module and read the effective pixel data of whole frame from collection memory cell order, and use bilinearity
Interpolation algorithm scales it the resolution sizes for 1920*1080, while being written into output memory cell；
6】Send the control that control module produces video blanking area according to SMPTE274 standard 1080i resolution videos agreement
Pixel stream, and the pixel data after scaling is sequentially read from output memory cell, it is filled into the valid pixel of video data stream
Area, so as to realize the conversion of SMPTE274 standard 1080i resolution video agreements.
Protocol detection module and video acquisition module work in the way of parallel pipelining process, each same stepping of protocol detection unit
Row matching, and produce matching result simultaneously in frame of video end of input.
Above-mentioned collection memory cell includes buffering area A and buffering area B, and specific storing step is：
During current video frame data Cun Chudao buffering area A, the previous frame video data that storage is read from buffering area B is sent
Give scaling processing module；
When the storage of next frame video data is to buffering B, the data that current video frame is read from buffering area A are sent to scaling
Processing module.
Above-mentioned protocol detection module is analyzed and calculates the following protocol status parameter of input video stream in real time：Adjacent field synchronization
The line synchronising signal Hsync pulse numbers included between signal Vsync pulses；Field sync signal Vsync pulse width ranges
The line synchronising signal Hsync pulse numbers inside included；The pixel clock CLK included between adjacent line synchronising signal Hsync pulses
Number of cycles；The pixel clock clk cycle number included in line synchronising signal Hsync pulse width ranges；In valid pixel row
The pixel clock clk cycle number included in data valid signal De pulse widths；From field sync signal Vsync impulse hits
To the line synchronising signal Hsync pulse numbers included between first valid pixel row；From the synchronous letter of row in valid pixel row
Feel the pulse to rush Hsync saltus steps and play the pixel clock clk cycle that is included between data valid signal De and count.
The VESA protocol videos detection unit of above-mentioned protocol detection module including various resolution ratio, various resolution ratio
RawRGB format videos detection unit, meet the video detecting unit of SMPTE274 agreements, meet ITU601, ITU656 and
The detection unit of ITU709 protocol videos；The VESA protocol videos collection that the video acquisition module includes various resolution ratio is single
The RawRGB format videos collecting unit of first, various resolution ratio, meet the video acquisition unit of SMPTE274 agreements, meet
The video acquisition unit of ITU601, ITU656 and ITU709 agreement；And detectable protocol type can be according to concrete application need
Ask autonomous customization and cut；
Above-mentioned steps 2】Concretely comprise the following steps：
2.1】Real-time synchronization calculates each state parameter of incoming video signal；
2.2】Each state parameter calculated is contrasted with the state parameter of each agreement of corresponding protocol detection module：
If state parameter is consistent, inputting video data belongs to this kind of agreement；Otherwise, then it is not belonging to this kind of agreement.
The beneficial effects of the invention are as follows：
The video of any protocol type and resolution ratio can be automatically converted to and meet SMPTE274 standard 1080i resolution ratio and regard
Frequency protocol video, and video format conversion is time-consuming small；Can dynamic detection video protocols change, when input source video protocols occur
After change, the detection to its protocol type can be completed in the time interval that a two field picture is inputted；Detectable protocol type can
With according to independently customization and the cutting of concrete application demand.
Brief description of the drawings
Fig. 1 is automatic switching method schematic diagram of the various video agreement to SMPTE274 agreement 1080i resolution videos.
Embodiment
The present invention realizes various video form to the automatic conversion of SMPTE274 agreement 1080i resolution videos using FPGA
Method, by setting up many general video protocol data storehouse, the data flow to incoming video signal is analyzed, and is commonly used with various
The affiliated protocol type of video protocol data stream multilevel iudge, while detection image resolution ratio and frame per second；Designed image frame double buffering
Area A and B, buffering area A is stored in by the way of ping-pong operation by the valid pixel of video stream data frame, while according to point of image
Resolution is scaled 1920*1080 resolution sizes to the complete data frame cached in buffering area B using bilinear interpolation algorithm
And it is stored in output memory cell；Control pixel stream is produced according to SMPTE274 standard 1080i resolution videos agreement, is deposited from output
The view data after scaling is read in storage unit and is filled into the effective pixel region of its pixel stream, so as to realize SMPTE274 standards
The conversion of 1080i resolution video agreements.Realize that details is specific as follows：
1】Design is for various conventional video protocols (including the VESA agreements of various resolution ratio, various resolution ratio
RawRGB forms, ITU601, ITU656, ITU709 and SMPTE274 agreement) detection module, detection module pass through analyze one
Whether the time interval of full frame images expert's field sync signal and the changing rule of blanking zone video data, judge input video
Belong to this kind of agreement；
Detection module sets the state parameter of following video protocols, is respectively：Adjacent field sync signal (Vsync) pulse it
Between line synchronising signal (Hsync) pulse number for being included, the Hsync pulse numbers included in Vsync pulse width ranges, phase
The clk cycle meter included in pixel clock (CLK) cycle count included between adjacent Hsync pulses, Hsync pulse width ranges
The clk cycle pulse number included in number, valid pixel row in data valid signal (De) pulse width, from Vsync signal arteries and veins
Rush saltus step play in the Hsync pulse numbers that (field blanking area) between first valid pixel row is included, valid pixel row from
Hsync signal pulse saltus steps play De signals it is effective between (horizontal blanking area) clk cycle for being included count；
2】The data of input video and control signal wire (CLK, Hsync, Vsync and De) are respectively fed to each video protocols
Detection module, detection module analyzes the data flow of input picture frame, detects and calculates above-mentioned state parameter, if the parameter detected
It is consistent with the state parameter of agreement to be detected, then it is assumed that input video belongs to this kind of agreement, otherwise, then it is not belonging to this kind of agreement；
If certain agreement matches input video, the detection module of this kind of agreement produces the enable signal CEn of high level, drives its correspondence
Acquisition module；Other protocol detection modules are output as low level signal simultaneously, and make corresponding video acquisition at its rear end
Module is in reset state.
3】A multidiameter option switch controller is designed, the CEn using the output of each video protocols detection module is control signal
Amount, the video data stream of each video protocols acquisition module collection is input, and gating CEn is the corresponding collection video data of high level
The follow-up caching of stream progress and scaling processing operation；
4】Double buffering A and B are designed, the valid pixel of the adjacent two field pictures continuously arrived is cached, to buffering area A and B
Ping-pong operation is carried out, when current frame image is filled into buffering area A, bilinear interpolation is used to the previous frame image cached in B
Algorithm is scaled 1920*1080 and differentiates size, and is filled into transmission output memory cell；, will be next in subsequent time period
Two field picture buffers into buffering area B and bilinear interpolation processing is carried out to the picture frame in buffering area A and transmission output storage is stored in
Unit；
5】According to the control pixel stream in SMPTE274 standard 1080i resolution videos agreement generation video blanking area, and from
Export and the pixel data after scaling is sequentially read in memory cell, the effective pixel region of video data stream is filled into, so as to realize
To the conversion of SMPTE274 standard 1080i resolution video agreements.
The automatic conversion control method of the present invention successful implementation in certain type ground Detecting Robot project, can
The video automatic detection of the various protocols gathered to infrared, laser and visible light sensor is realized, video scaling processing is completed simultaneously
The 1080i resolution videos for meeting SMPTE274 standards are uniformly converted to, the processing speed of Video Quality Metric is fast, and output is clear steady
It is fixed.
Claims (6)
1. more than automatic switching method from video format to SMPTE274 agreement 1080i resolution videos, it is characterised in that including with
Lower step：
1】Create automated conversion system：
Including protocol detection module：High level is produced for carrying out agreement matching to incoming video signal, and according to matching result
Enable signal CEn or low level enables signal, including the detection unit of agreement 1, the detection unit ... of agreement 2 and agreement N detections
Unit；
Video acquisition module：The valid pixel of incoming video signal to matching by protocol detection module is acquired, and is wrapped
Include the collecting unit of agreement 1, the collecting unit ... of agreement 2 and agreement N collecting units；The collecting unit of various agreements is single with detection
Member is corresponded, and the high level enables signal CEn and inputted to corresponding agreement N collecting units and multidiameter option switch control
Device；
Multidiameter option switch controller：For under the control that high level enables signal CEn, the video acquisition mould that agreement is matched
The effective pixel data that block is collected buffers into collection memory cell；
Gather memory cell：Effective pixel data for caching incoming video signal；
Scale processing module：Effective pixel data is read from collection memory cell and use bilinear interpolation for real time sequence
Algorithm scales it the resolution sizes for 1920*1080, while sending it to output memory cell；
Export memory cell：For storing the effective pixel data after scaling processing module processing；
And send control module：For producing video blanking area according to SMPTE274 standard 1080i resolution videos agreement
Pixel stream is controlled, and the pixel data after scaling is sequentially read from output memory cell, the effective of video data stream is filled into
Pixel region, so as to realize the conversion of SMPTE274 standard 1080i resolution video agreements；
2】The vision signal of input is respectively fed into protocol detection module to be detected in each protocol detection unit, if defeated
The vision signal entered is matched with the agreement of agreement N detection units, then agreement N detection units produce the enable signal of high level
CEn, while remaining protocol detection unit, which produces low level, enables signal；
3】High level enables signal CEn and drives agreement N collecting units collection incoming video signal corresponding with agreement N detection units
Valid pixel；Low level enables signal and makes to be in reset state with the agreement collecting unit corresponding to it simultaneously；
4】High level enables signal CEn as the control signal amount of multidiameter option switch controller so that only agreement is matched
The valid pixel of the vision signal of agreement N collecting units collection is single to storage is gathered by multidiameter option switch controller cache
Member；
5】Scale processing module and read the effective pixel data of whole frame from collection memory cell order, and use bilinear interpolation
Algorithm scales it the resolution sizes for 1920*1080, while being written into output memory cell；
6】Send the control pixel that control module produces video blanking area according to SMPTE274 standard 1080i resolution videos agreement
Stream, and the pixel data after scaling is sequentially read from output memory cell, the effective pixel region of video data stream is filled into, from
And the conversion realized to SMPTE274 standard 1080i resolution video agreements.
2. many video formats according to claim 1 are to the automatic conversion side of SMPTE274 agreement 1080i resolution videos
Method, it is characterised in that：Protocol detection module and video acquisition module work in the way of parallel pipelining process, each protocol detection unit
It is synchronous to be matched, and produce matching result simultaneously in frame of video end of input.
3. many video formats according to claim 1 or 2 are to the automatic conversion of SMPTE274 agreement 1080i resolution videos
Method, it is characterised in that the collection memory cell includes buffering area A and buffering area B, specific storing step is：
During current video frame data Cun Chudao buffering area A, the previous frame video data that storage is read from buffering area B is sent to contracting
Put processing module；
When the storage of next frame video data is to buffering B, the data that current video frame is read from buffering area A are sent to scaling processing
Module.
4. many video formats according to claim 3 are to the automatic conversion side of SMPTE274 agreement 1080i resolution videos
Method, it is characterised in that
The protocol detection module is analyzed and calculates the following protocol status parameter of input video stream in real time：Adjacent field sync signal
The line synchronising signal Hsync pulse numbers included between Vsync pulses；Wrapped in field sync signal Vsync pulse width ranges
The line synchronising signal Hsync pulse numbers contained；The pixel clock clk cycle included between adjacent line synchronising signal Hsync pulses
Number；The pixel clock clk cycle number included in line synchronising signal Hsync pulse width ranges；Data in valid pixel row
The pixel clock clk cycle number included in useful signal De pulse widths；Is played from field sync signal Vsync impulse hits
The line synchronising signal Hsync pulse numbers included between one valid pixel row；From line synchronising signal arteries and veins in valid pixel row
Rush Hsync saltus steps and play the pixel clock clk cycle counting included between data valid signal De.
5. many video formats according to claim 4 are to the automatic conversion side of SMPTE274 agreement 1080i resolution videos
Method, it is characterised in that：
The protocol detection module includes the VESA protocol videos detection unit of various resolution ratio, the RawRGB lattice of various resolution ratio
Formula video detecting unit, the video detecting unit for meeting SMPTE274 agreements, meet ITU601, ITU656 and ITU709 agreement and regard
The detection unit of frequency；The video acquisition module includes the VESA protocol videos collecting unit of various resolution ratio, various resolution ratio
RawRGB format videos collecting unit, meet the video acquisition unit of SMPTE274 agreements, meet ITU601, ITU656 and
The video acquisition unit of ITU709 agreements；And detectable protocol type independently can be customized and cut out according to concrete application demand
Cut.
6. many video formats according to claim 5 are to the automatic conversion side of SMPTE274 agreement 1080i resolution videos
Method, it is characterised in that
The step 2】Concretely comprise the following steps：
2.1】Real-time synchronization calculates each state parameter of incoming video signal；
2.2】Each state parameter calculated is contrasted with the state parameter of each agreement of corresponding protocol detection module：If
State parameter is consistent, then inputting video data belongs to this kind of agreement；Otherwise, then it is not belonging to this kind of agreement.
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